Derrick jack



Aug. 27, 1929. A. 1.. bAY

' I DERRICK JACK Filed July 5, 1927 2 Sheets-Sheet 1 A. L. DAY

Aug. 27, 1929.

DERRICK JACK Filed July 5, 1927 2 Sheets-Sheet Patented Aug. 27, 1929.

UNITED f STATES ARTHUR L. DAY, OF TULSA,'OKLAHOMA, ASSIG-NOR T0 BRADEN STEEL & WINCH 00.,

unease PATENT OFFICE.

OF TULSA, OKLAHOIVIA, A CORPORATIONOF OKLAHOMA.

DERRICK JACK.

Application filed July .5, 1927. Serial No. 203,604..

My invention relates to new and useful improvements in derrick jacks, and has for its object to provide a device especially adapted for adjusting the length of relegs or reinforcing legs, employed in connection with well drilling derricks.

Another object of my invention is to provide a jack which will securely retain the relegs in place when adjusted.

Still further objects and advantages of my invention are the simplicity in construction and operation, and its great durability.

With the above and other objects in view which will appear as the description proceeds, my invention consists in the new and useful features herein set forth in detail, illustrated in the accompanying drawings, and more particularly pointed out in the appended claims.

Referring to the drawings, in which numerals of like character designate similar parts throughout the several views, I

Fig. 1 is a perspective view in side elevation, showing the wedge membersin place,

Fig. 2 is a view in perspective showing the separate parts of the jack, i

Fig. 3 is a side elevation showing the device applied to a derrick, and

Fig. 4 is a top plan View of said jack.

In the drawings, 1 represents the main body portion of my improved jack which consists of two horizontally extending vertical side walls 2 and 3, formed integraland extending at right angles to one another. The lower portion of the inner surface of each of said side walls is recessed as at 4 which recess extends longitudinally throughout the entire length of said inner surface, forming an inwardly projecting shoulder 5. 6 and 7 represent longitudinal slots in the side walls 2 and 3, respectively, which extend inwardly for a predetermined distance from the outer extremity of said walls, for the purpose hereinafter set forth. On the upper edge of each wall 2 and 3, at. its outer end, I provide outwardly projecting horizontal ears 8 and 9, apertured to receive bolts 10 for securing said body portion 1 to the top 11 of the derrick. At the inner extremities of the slots 6 and 7, integral with the walls 2 and 3, I provide outwardly projecting vertical ears 12 and 13, each of which is provided with a threaded aperture.

14 represents a V-shaped base member, adapted to engage the inner surface of the recess 4 in the body member 1, and being provided throughout the entire length of its lower edge with a groove 15, which will be hereinafter referred to more in detail. The upper surfaces 16 and 17 of the arms of the base member 14 are inclined upwardly from the outer ends thereof, forming an apex at their inner extremities as clearly shown in Fig. '2 of the drawings.

18 and '19 represent horizontal wedge blocks having their lower edges inclined to correspond with the upper surfaces 16 and 17 of the base member 14 their upper edges being parallel with the shoulder 5 on the body member 1. The outer face of each of the wedge blocks 18 and 19 is provided intermediate its end with an outwardly projecting vertical car 20 and 21, respectively, which ears are apertured horizontally to receive bolts 22, threaded to engage nuts 23. These ears are reduced at their inner ends, adjacent the wedge blocks to register with and slide in the slots 6 and 7.

InFig. 3 of the drawings, 24 represents one of the usual main legs of the derrick, and 25, a releg or reinforcing leg, both of which are of the conventional type, and consist of angle irons, and 27 designates a corner joint.

The use and operation of my improved derrick jack are as follows. The body mem her 1 is bolted to the top 11 of the derrick by means of bolts 10 passing through ears 8 and 9, the inner surface of said bodymember abutting the outer surface of the corner joint 27 on the angle iron main leg 24 ofthe derrick, which leg is secured to the top 11 by any suitable means. The wedge blocks 18 and 19 are then slipped in place in the recess 4, with their upper edges abutting the under surface of the shoulder 5, the

reduced portions of the ears 20 and 21, en-

gaging the slots 6 and 7 respectively, to hold said wedge blocks in place. Each releg 25 which is slightly shorter than the main legs 24, is then placed in position just outside the adjacent main leg, and the base member 14 is mounted on top thereof, the grooves 15 in the lower edge thereof, engaging the upper edge of said releg to retain the same in place, as clearly shown in Fig. 3 of the drawings. This brings the base member 15.4.

within the recess 4 in the body member 1, just beneath the wedge blocks 18 and 19, the inclined surfaces 16 and 17 of said base member abutting the inclined lower surfaces of said wedge blocks. Threaded bolts 22 are then passed through the ears 20 and 21 of the wedge blocks, and 12 and 13 of the body member and nut 23 applied to the ends thereof.

It will thus be seen that by tightening the bolts 22, the wedges 18 and 19 will be forced inwardly, causing the base member 14 to be forced downwardly against the upper edges of the releg 25. When it is desired to remove the releg from the derrick, the bolts 22 are unscrewed, backing out the wedge blocks 18 and 19, to relieve the pressure on the upper surface of the base member 14, which permits the relegs 25 to be sllpped out from under.

In Fig. 4 I have shown springs 26, applied to the bolts 22, between their heads and the ears 12 and 13 of the body member 1, which in case of slight settlement at the joints of the releg, will function to keep said relegs in their proper position. With this arrangement, the bolts 22 are-tightened until the springs 26 are compressed, thus main taining a constant pressure on the wedge blocks 18 and 19.

From the foregoing, it is believed that the construction, operation and advantages of my invention may be clearly understood by those skilled in the art, and I am aware that numerous changes may be made in the details disclosed without departing from the spirit of the invention as expressed in the following claims.

What I claim and desire to secure by Letters Patent is:

1. In a derrick including a top and angle leg jack comprising an angular body member, an angular base member adapted to register with said body member and engage the upper edge of an angle leg, and means cooperating with said body member and base member to force the same apart vertically.

2. A derrick jack comprising a body member provided with a recess, a base member adapted to fit in said recess and engage the upper edge of a derrick leg, wedge blocks also mounted in said recess abutting the upper surface of saidbase member, and means for moving said wedge blocks longitudinally in said recess, whereby said base member and body member are forced apart vertically.

3. A derrick jack as claimed in claim 2, wherein one of said members is provided with an inclined surface to register with the inclined surfaces of said wedge blocks.

4. A derrick jack as claimed in claim 2, wherein said base member is provided with an inclined upper surface adapted to register with the inclined surfaces of said wedge blocks.

5. A derrick jack comprising a body member having angularly disposed, vertically extending side walls, recessed on their inner faces, longitudinal slots in said walls, a base member also angular in shape and adapted to fit in said recess, said base being provided along its lower edge with a groove adapted to engage the upper edge of a derrick leg,

its upper surface being inclined, wedge blocks slidably mounted in said recess engaging the inclined surface of said base member, apertured ears on said body member and on said wedge blocks, the latter registering with said slots in the body member, and bolts adapted to pass through said ears to move said wedge blocks longitudinally in said recess, whereby said body and base members are forced apart.

6. A derrick jack as claimed in claim 5, wherein springs are mounted on said bolts between their heads and said ears on the body member.

7. A derrick jack comprising a body member having angularly disposed, vertically ex tending side walls, recessed on their inner faces, a base member also angular in shape and adapted to fit in said recess, said base being provided long its lower edge with a groove adapted to engage the upper edge of a derrick leg, its upper surface being inclined, wedge blocks slidably mounted in said recess engaging the inclined surface of said base member, and means for moving said wedge blocks longitudinally in said recess to force said body and base members apart.

8. A derrick jack comprising a body member having angularly disposed, vertically extending side walls, a base member also angular in shape and adapted to fit in said body member, said base being provided with means for engaging the upper edge of a derrick leg, the upper surface of said base being inclined, wedge blocks slidably mounted in said body engaging the inclined surface of said base member, and means for moving said wedge blocks longitudinally in said body to force the latter and the base member apart.

In testimony whereof I aflix my signature.

ARTHUR L. DAY. 

